Device for the generation of artificial fog



Jan.

o. ROTH 2,969,333

DEVICE: FOR THE GENERATION oF ARTIFICIAL FOG Filed Feb. 25, 1958 BYJMWW Unid SttCS Patent O f DEVICE FOR THE GENERATION OF ARTIFICIAL FOG Oskar Roth, Huttenheim, Baden, Germany, assigner to Inventor-Kreditanstalt, Vaduz, Liechtenstein, a lcompany Aof Liechtenstein Filed Feb. 25, 1958, Ser. No.-717433 Claims priority, application Austria Feb. V28, 1957 6 Claims. (Cl. 252-5359) The present invention relates to a device for the generation of artificial fog in which oil is added to water via a mixing nozzle and in which the mixture of water and oil is heated on heat-exchanging surfaces.

An object of the present invention is the provision of an improved device for the generation of artificial fog.

A further object of the invention resides in the provision of a device which is lighter in weight than those heretofore known to the art, so that it can readily be carried by one man.

A further object of the invention is the high degree of eiciency thereof which ensures that a maximum of fog is generated with a minimum of fuel, oil and water consumption.

A further object of the invention is the comparatively simple design of the device without mobile members which renders it easy to operate and reliable in operation.

The device consists mainly of two hollow cylinders arranged concentrically relative to one another, the outer cylinder holding water and the inner cylinder holding wateroil mixture, whereby heating gases pass first through the inner cylinder and then through the hollow space formed by the inner and outer cylinders.

A-n embodiment of the invention is illustrated in the attached drawing.

The device according to this invention consists of two coaxially disposed vertical hollow cylinders 1 and 2. The outer hollow cylinder 1 is designed to hold water between its inner cylindrical wall 17 which is spaced from outer cylindrical wall 18 forming a first outer chamber and has its lower end provided with a Water inlet connection 3.

The inner hollow cylinder 2 is formed of an inner cylindrical wall 19 spaced from outer cylindrical wall 20 forming a second inner chamber and has its upper end provided with `au outer oil inlet connection 5. The two hollow cylinders 1 and 2 have their upper ends interconnected by a mixing nozzle 4. The inner hollow cylinder 2 has its interior equipped with an oil distributor designed as a spiral wire 6. It would be possible t-o select some other design for the oil distributor, by' way of example that of horizontal, perfo-rated intermediate rings, spiral grooves and the like. The upper end of -the tw-o hollow cylinders 1, Z is provided with a deflecting cap through which the heating gases rising in the heating chamber 9 are deflected and passed into the cylindrical hollow space 11 between the inner and outer hollow cylinders, where they descend. The said heating gases emerge at the lower end of the outer hollow cylinder, are detiected by the funnel-type boundary wall 12 of the firing chamber, rise in the annular channel 13 and finally pass into the atmosphere through the outlet funnel 15.

Arranged at the bottom of the device is a source of heat 8, by way of example an oil burner.

The device operates as follows: Water is supplied 2,969,333 Patented .Ian. 2.4,

through the inlet connection 3 and oil is supplied at low pressure through connection 5. The heat generated by ythe source 8 causes the water to evaporate in the outer hollow cylinder 1 so that the overheated steam flows into the mixing nozzle 4 and into the inner hollow cylinder 2. The oil contained therein evaporates as well and the individual steam molecules are coated with a film of oil vapor so that a dense fog finally emerges from the outlet 7. The oil distributor 6 is designed t-o conduct the oil along the entire circumference of the heated inner cylinder wall so as to ensure a favorable utilization of the heat and complete oil vaporization. According to the mixture ratio between water and Voil and the temperature conditions, the composition of thefo'g can be valtered so as to become dry or wet, dense or thin.

Additional members arranged at the outlet connection would enable certain agents to be added, such as agents against parasites. The fog outlet pipe could be designed to accommodatethe head of a so-called aerosol reservoir, the outlet of the latter being adjustable by a rotary movement. It would also be possible to provide the fog outlet pipe with an injector having interchangeable nozzles so that agents, dyes and the like can be added.

It would further be possible to design an ambodiment of the invention with electric heating, the electric heating elements being preferably accommodated in the hollow spaces 9 and 11.

An advantage of the present device resides in the fact that it can be carried by a single person and that it is highly efficient in that an embodiment having a dead weight of approximately 18 lbs. and a fuel consumption of approximately 11 lbs. of water and oil each will fog .04 mile per hour. The range may be further increased by combining several devices into groups.

It would be possible to replace the oil and the water by other suitable materials or liquids.

Various changes and modifications may be made without departing from the spirit and scope of the present invention and it is intended that such obvious changes and modifications be embraced by the annexed claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

l. A device for the generation of artificial fog comprising a first inner hollow cylinder including spaced cylindrical walls forming a first chamber, a second outer hollow cylinder including spaced cylindrical walls forming a second chamber arranged in spaced coaxial relationship relative to said first hollow cylinder, combustion means including a source of heat for heating gases below said first chamber and said second chamber, a first defiecting member for the heating gases from said combustion means at the upper end of the said first and second chambers and overlying said first and second hollow cylinders a second deliecting member for the heating gases at the lower end of said first and second chambers, a jacket coaxial with the said first and second hollow cylinders forming a first annular space around the said second hollow cylinder, said second defiecting member extending between said jacket and said first hollow cylinder, a second annular space being formed between the said first hollow cylinder and the said second hollow cylinder, said first defiecting member deflecting the heating into said second annular space, said second defiecting member deflecting heating gases passing from said second annular space into said first annular space, said first hollow cylinder being provided with a connection enabling oil to be supplied to said first chamber, said second hollow cylinder being provided with a connection for the supply of water to said second chamber, means in said first chamber for distributing the oil along the surfaces of "said spaced cylin- 

1. A DEVICE FOR THE GENERATION OF ARTIFICIAL FOG COMPRISING A FIRST INNER HOLLOW CYLINDER INCLUDING SPACED CYLINDRICAL WALLS FORMING A FIRST CHAMBER, A SECOND OUTER HOLLOW CYLINDER INCLUDING SPACED CYLINDRICAL WALLS FORMING A SECOND CHAMBER ARRANGED IN SPACED COAXIAL RELATIONSHIP RELATIVE TO SAID FIRST HALLOW CYLINDER, COMBUSTION MEANS INCLUDING A SOURCE OF HEAT FOR HEATING GASES BELOW SAID FIRST CHAMBER AND SAID SECOND CHAMBER, A FIRST DEFLECTING MEMBER FOR THE HEATING GASES FROM SAID COMBUSTION MEANS AT THE UPPER END OF THE SAID FIRST AND SECOND CHAMBERS AND OVERLYING SAID FIRST AND SECOND HOLLOW CYLINDERS A SECOND DEFLECTING MEMBER FOR THE HEATING GASES AT THE LOWER END OF SAID FIRST AND SECOND CHAMBERS, A JACKET COAXIAL WITH THE SAID FIRST AND SECOND HOLLOW CYLINDERS FORMING A FIRST ANNULAR SPACE AROUND THE SAID SECOND HOLLOW CYLINDER, SAID SECOND DEFLECTING MEMBER EXTENDING BETWEEN SAID JACKET AND SAID FIRST HOLLOW CYLINDER, A SECOND ANNULAR SPACE BEING FORMED BETWEEN THE SAID FIRST HOLLOW CYLINDER AND THE SAID SECOND HOLLOW CYLINDER, SAID FIRST DEFLECTING MEMBER DEFLECTING THE HEATING INTO SAID SECOND ANNULAR SPACE, SAID SECOND DEFLECTING MEMBER DEFLECTING HEATING GASES 